Now that we've all seen the gutted insides of Apple TV, some forum users claim to have hacked into the unit and gotten it to run nonsupported codecs like XviD. The actual hacking shouldn't be too hard for the skilled. It involves removing and mounting App TV's hard drive and installing a few scripts. The chances of this being true are pretty slim (until we see further proof), so you may wanna hold off before running that victory lap. – Louis Ramirez